Corpora: Navaho Speech Corpora

[Keith C. Herold]

I interested in doing some work on Navaho and was wondering if any
Navaho speech corpora exist.  If so, how big are they and are they
easily obtained (i. e. how willing is the tribe to allow cooperative
work)?

Any information on work done on such corpora would also be appreciated,
as well as contact info.

Keith Herold
_____
Dept. of Linguistics
http://www.colorado.edu/ling
The Center for Speech and Language Research
http://cslr.colorado.edu
University of Colorado, Boulder
USA